springMVC+spring+mybatis多数据源配置

1.application.properties配置

<?xml version="1.0" encoding="UTF-8"?>
<beans xmlns="http://www.springframework.org/schema/beans"
	xmlns:context="http://www.springframework.org/schema/context"
	xmlns:xsi="http://www.w3.org/2001/XMLSchema-instance" xmlns:aop="http://www.springframework.org/schema/aop"
	xmlns:tx="http://www.springframework.org/schema/tx" xmlns:p="http://www.springframework.org/schema/p"
	xmlns:util="http://www.springframework.org/schema/util" xmlns:jdbc="http://www.springframework.org/schema/jdbc"
	xmlns:cache="http://www.springframework.org/schema/cache"
	xsi:schemaLocation="http://www.springframework.org/schema/beans
        http://www.springframework.org/schema/beans/spring-beans.xsd
        http://www.springframework.org/schema/util
        http://www.springframework.org/schema/util/spring-util.xsd
        http://www.springframework.org/schema/context
        http://www.springframework.org/schema/context/spring-context.xsd
        http://www.springframework.org/schema/aop
        http://www.springframework.org/schema/aop/spring-aop.xsd
        http://www.springframework.org/schema/tx
        http://www.springframework.org/schema/tx/spring-tx.xsd">

	<!-- 自动扫描spring注解，排除springmvc已扫描的Controller注解 -->
	<context:component-scan base-package="com.ln.web">
		<context:exclude-filter type="annotation"
			expression="org.springframework.stereotype.Controller" />
	</context:component-scan>

	<!-- mybatis与spring整合 -->
	<!-- 引入配置文件 -->
	<bean id="propertyConfigurer"
		class="org.springframework.beans.factory.config.PropertyPlaceholderConfigurer">
		<property name="locations">
			<list>
				<value>classpath*:application.properties</value>
			</list>
		</property>
	</bean>
	<!-- dataSource 配置 -->
	<bean id="dataSource" class="com.alibaba.druid.pool.DruidDataSource"
		init-method="init" destroy-method="close">
		<!-- 基本属性 url、user、password -->
		<property name="url" value="${jdbc.url}" />
		<property name="username" value="${jdbc.username}" />
		<property name="password" value="${jdbc.password}" />

		<!-- 配置初始化大小、最小、最大 -->
		<property name="initialSize" value="${ds.initialSize}" />
		<property name="minIdle" value="${ds.minIdle}" />
		<property name="maxActive" value="${ds.maxActive}" />

		<!-- 配置获取连接等待超时的时间 -->
		<property name="maxWait" value="${ds.maxWait}" />

		<!-- 配置间隔多久才进行一次检测，检测需要关闭的空闲连接，单位是毫秒 -->
		<property name="timeBetweenEvictionRunsMillis" value="${ds.timeBetweenEvictionRunsMillis}" />

		<!-- 配置一个连接在池中最小生存的时间，单位是毫秒 -->
		<property name="minEvictableIdleTimeMillis" value="${ds.minEvictableIdleTimeMillis}" />

	</bean>
	<!-- 配置sqlSessionFactory -->
	<bean id="sqlSessionFactory" class="org.mybatis.spring.SqlSessionFactoryBean">
		<property name="configLocation" value="classpath:mybatis-config.xml" />
		<property name="dataSource" ref="dataSource" />
		<property name="mapperLocations" value="classpath:com/ln/web/dao/*.xml"></property>
	</bean>

	<!-- 对dataSource 数据源进行事务管理 -->
	<bean id="transactionManager"
		class="org.springframework.jdbc.datasource.DataSourceTransactionManager">
		<property name="dataSource" ref="dataSource"></property>
	</bean>

	<!-- 扫描mapper接口 -->
	<bean class="org.mybatis.spring.mapper.MapperScannerConfigurer">
		<property name="basePackage" value="com.ln.web.dao"></property>
		<property name="sqlSessionFactoryBeanName" value="sqlSessionFactory"></property>
	</bean>
 <!-- 事务管理 通知 -->
    <tx:advice id="txAdvice" transaction-manager="transactionManager">
        <tx:attributes>
            <!-- 对insert,update,delete 开头的方法进行事务管理,只要有异常就回滚 -->
            <tx:method name="insert*" propagation="REQUIRED" rollback-for="java.lang.Throwable"/>
            <tx:method name="update*" propagation="REQUIRED" rollback-for="java.lang.Throwable"/>
            <tx:method name="delete*" propagation="REQUIRED" rollback-for="java.lang.Throwable"/>
            <!-- select,count开头的方法,开启只读,提高数据库访问性能 -->
            <tx:method name="select*" read-only="true"/>
            <tx:method name="count*" read-only="true"/>
            <!-- 对其他方法 使用默认的事务管理 -->
            <tx:method name="*"/>
        </tx:attributes>
    </tx:advice>
	<!-- 启用对事务注解的支持 -->
	<tx:annotation-driven transaction-manager="transactionManager" />

	<!-- 配置多个数据源 -->
	<bean id="dataSource2" class="com.alibaba.druid.pool.DruidDataSource"
		init-method="init" destroy-method="close">
		<!-- 基本属性 url、user、password -->
		<property name="url" value="${jdbc.url_2}" />
		<property name="username" value="${jdbc.username_2}" />
		<property name="password" value="${jdbc.password_2}" />

		<!-- 配置初始化大小、最小、最大 -->
		<property name="initialSize" value="${ds.initialSize}" />
		<property name="minIdle" value="${ds.minIdle}" />
		<property name="maxActive" value="${ds.maxActive}" />

		<!-- 配置获取连接等待超时的时间 -->
		<property name="maxWait" value="${ds.maxWait}" />

		<!-- 配置间隔多久才进行一次检测，检测需要关闭的空闲连接，单位是毫秒 -->
		<property name="timeBetweenEvictionRunsMillis" value="${ds.timeBetweenEvictionRunsMillis}" />

		<!-- 配置一个连接在池中最小生存的时间，单位是毫秒 -->
		<property name="minEvictableIdleTimeMillis" value="${ds.minEvictableIdleTimeMillis}" />
	</bean>
	<!-- 配置sqlSessionFactory -->
	<bean id="sqlSessionFactory2" class="org.mybatis.spring.SqlSessionFactoryBean">
		<property name="configLocation" value="classpath:mybatis-config-2.xml" />
		<property name="dataSource" ref="dataSource2" />
		<property name="mapperLocations" value="classpath:com/ln/web/db2/dao/*.xml"></property>
	</bean>
	<!-- 对dataSource 数据源进行事务管理 -->
	<bean id="transactionManager2"
		class="org.springframework.jdbc.datasource.DataSourceTransactionManager">
		<property name="dataSource" ref="dataSource2"></property>
	</bean>

    <!-- 事务管理 通知 -->
    <tx:advice id="txAdvice2" transaction-manager="transactionManager2">
        <tx:attributes>
            <!-- 对insert,update,delete 开头的方法进行事务管理,只要有异常就回滚 -->
            <tx:method name="insert*" propagation="REQUIRED" rollback-for="java.lang.Throwable"/>
            <tx:method name="update*" propagation="REQUIRED" rollback-for="java.lang.Throwable"/>
            <tx:method name="delete*" propagation="REQUIRED" rollback-for="java.lang.Throwable"/>
            <!-- select,count开头的方法,开启只读,提高数据库访问性能 -->
            <tx:method name="select*" read-only="true"/>
            <tx:method name="count*" read-only="true"/>
            <!-- 对其他方法 使用默认的事务管理 -->
            <tx:method name="*"/>
        </tx:attributes>
    </tx:advice>
    	  <!-- 事务 aop 配置 -->
    <aop:config>
        <aop:pointcut id="serviceMethods" expression="execution(* com.simple.web.service..*(..))"/>
        <aop:advisor advice-ref="txAdvice" pointcut-ref="serviceMethods"/>
        <aop:advisor advice-ref="txAdvice2" pointcut-ref="serviceMethods"/>
    </aop:config>
    	<!-- 启用对事务注解的支持 -->
	<tx:annotation-driven transaction-manager="transactionManager2" />
	<!-- 扫描mapper接口 -->
	<bean class="org.mybatis.spring.mapper.MapperScannerConfigurer">
		<property name="basePackage" value="com.ln.web.db2.dao"></property>
		<property name="sqlSessionFactoryBeanName" value="sqlSessionFactory2"></property>
	</bean>

</beans>

2.mybatis配置文件：

mybatis-config.xml

<?xml version="1.0" encoding="UTF-8" ?>
<!DOCTYPE configuration
        PUBLIC "-//mybatis.org//DTD Config 3.0//EN"
        "classpath:schema/mybatis-3-config.dtd">
<configuration>

 <typeAliases>
        <package name="com.ln.web.model"/>
    </typeAliases>
</configuration>

mybatis-config-2.xml

<?xml version="1.0" encoding="UTF-8" ?>
<!DOCTYPE configuration
        PUBLIC "-//mybatis.org//DTD Config 3.0//EN"
        "classpath:schema/mybatis-3-config.dtd">
<configuration>

 <typeAliases>
        <package name="com.ln.web.db2.model"/>
    </typeAliases>
</configuration>

3.目录结构